PDR (Personal Defense Rifle) is a compact type bullpup carbine being developed by Magpul. It is designed to replace some SMG, M9 Pistol and M4 Carbine while still offering the rapid fire and range of a M4 Carbine in a ultra compact firearm. Also, PDR is one of the few PDW (Personal Defense Weapon) to use standard caliber 5.56x45mm NATO).

PDR-C (C= Compact), is a more compact version of the PDR, which features an P90 style pistol grip and ergonomics offering a more compact weapon.